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Thermal stability of Co–Ti multilayered neutron polarizers

M., Maaza and M., Spegel and C., Sella and B., Pardo and A., Menelle and J., Corno and R., Gaziel (1999) Thermal stability of Co–Ti multilayered neutron polarizers. Solid State Communications .

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Abstract

hermal stability of multilayered Co–Ti neutron optic polarizers with a period of the order of 103 Å is investigated. The diffusion kinetics is determined by using the Du Mond and Youtz's method with grazing angle neutron reflectometry in the temperature range of 293–723 K. It was found that the diffusion is mainly directed from Co-layers towards the Ti-layers. The effective interdiffusion coefficient Deff of cobalt into titanium is calculated from the rate of decrease of the first reflected Bragg peak related to the artificial periodicity of the multilayer with the annealing temperature T. The temperature dependence of Deff is found to be described approximately by Deff≈(D0 exp (−0.25 eV/kBT)) cm2 s−1

Item Type:Article
Uncontrolled Keywords:A. Surfaces and interfaces; A. Thin films; E. Neutron scattering
Subjects:Material Science > Functional and hybrid materials
Analytical Science > Beam methods
Physical Science > Photonics
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
ID Code:7870
Deposited By:Dr Balla Diop Ngom
Deposited On:28 Nov 2009 20:13
Last Modified:21 Jan 2010 16:26

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